Magloop antenna built by PY1AHD - Alex:http://www.alexloop.comThis video shows the SWR measurement for the 40 meters band using AlexLoop MagLoop Antenna with 3 different radios.Yaesu FT-817nd:http://www.yaesu.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=102&encProdID=06014CD0AFA0702B25B12AB4DC9C0D27&DivisionID=65&isArchived=0Kenwood TS-480 SAT:http://www.kenwoodusa.com/Communications/Amateur_Radio/HF_Base_Mobile/TS-480HX-480SATElecraft KX3:http://www.elecraft.com/KX3/kx3.htmWe also used an analyzer from iPortable. iP30Z:http://www.iportableus.com/_mgxroot/page_10743.htmlVisit:http://qrz.com/db/PT2EBR - Tiago's QRZ Pagehttp://qrz.com/db/PU2CLR - Ricardo's QRZ Pagehttp://qrz.com/db/PU2BRU - Bruno's QRZ PageDarrin Walraven (K5DVW) article "Undestanding SWR by example":http://www.arrl.org/files/file/Technology/tis/info/pdf/q1106037.pdfValues found on iP30Z:PT2EBR's = 1.4:1 SWRPU2BRU's = 1.4:1 SWR (varying to 1.5)PU2CLR's = 1.2:1 SWR (varying to 1.3)Values found on radios:PT2EBR's = no SWR bars on FT817ndPU2BRU's = 1.1:1 on TS480SATPU2CLR's = 1.2:1 on Elecraft KX3HAMBSB - Brasilia HamRadio Group